What is the primary use of a micron gauge?

A micron gauge is primarily used to measure small changes in deep vacuum below 29 inches of mercury (Hg), making it particularly useful in applications such as refrigeration and HVAC for assessing the level of vacuum achieved during system evacuation.

In these contexts, deep vacuum measurements are critical because they help technicians determine whether moisture and non-condensable gases have been adequately removed from the system. The micron gauge provides measurements in microns, which allows for a more precise assessment of the vacuum level than traditional gauges, especially when reaching deep vacuums. For example, a reading of around 500 microns is generally considered the threshold for ensuring that a system is adequately evacuated.

Understanding these minute changes is key to ensuring HVAC systems operate efficiently, as leftover moisture can cause corrosion, ice formation, and decreased system performance. Therefore, the functionality of the micron gauge is vital in maintaining the integrity and efficiency of refrigeration systems.